Tension Roller Pressure Adjustment; Drum Height Control Adjustment - Jet 22-44OSC Operating Instructions And Parts Manual

Tension Roller Pressure Adjustment

You can increase or decrease tension roller
pressure by turning the screws on the tension
roller brackets (Figure 25).
Figure 25
Too much tension roller pressure can result in a
"snipe" mark, which is identified as a visible line
running across the width of the board and
located approximately 2-1/4" from the end of the
board.
If the snipe occurs on the leading end of the
board, adjust the outfeed tension roller. If the
snipe occurs on the trailing end of the board,
adjust the infeed tension roller.
Tension roller pressure can also be adjusted by
raising the height of the rollers, as follows:
1. Repeat "Tension Roller Alignment" except
raise the sanding drum only 1/4 turn of the
height adjustment handle.
2. If both tension rollers are causing snipe then
tighten all four hex nuts (E, Fig. 24) at this
position.
3. If only outfeed tension roller causes snipe,
only tighten rear (outfeed) hex nuts on each
end of drum at this position, then raise
sanding drum another 3/4 turn of the handle.
4. Press infeed tension roller down to rest on
conveyor bed and tighten front (infeed) hex
nuts at this position.
This process sets the tension roller assembly at
an angle providing less tension pressure on the
outfeed roller.

Drum Height Control Adjustment

If the height control mechanism does not
operate easily or smoothly or there is excessive
vertical movement or deflection of the drum
carriage, perform the following adjustments.
1. Tighten all four lock nuts (A, Fig. 26) and
then loosen them 1/8 to 1/4 turn. If the lock
nuts are set too tight, height control will not
operate easily. If the lock nuts are too loose,
excessive deflection of the outboard end of
the drum carriage will result.
2. Thoroughly lubricate the mating surfaces of
the motor mount slide (B, Fig. 26), and the
height adjustment screw (C, Fig. 26).
18
Figure 26